X2- is isoelectronic with ”O2+" and has Z+1 neutron (Z is atomic number of X2-)then:

Question

X2- is isoelectronic with ”O2+" and has Z+1 neutron (Z is atomic number of X2-)then:

Comments

You from which standard

Answer 1

X₂^-  is having 15 electrons = no. of protons 

Hence X=Nitrogen

Z=7

Number of neutrons = 8

might be answer is incorrect bcoz u hv not written ques in a right manner